145 lines
28 KiB
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145 lines
28 KiB
XML
<document id="F9F7DE4E95DD47922F60712CA561866C" ID-DOI="10.4467/16890027AP.15.013.3210" ID-ISSN="1689-0027" ID-Zenodo-Dep="12638210" IM.bibliography_approvedBy="felipe" IM.illustrations_approvedBy="felipe" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="GgImagineBatch" IM.taxonomicNames_approvedBy="felipe" IM.treatments_approvedBy="felipe" checkinTime="1720037028310" checkinUser="felipe" docAuthor="Thomsen, Helge A. & Østergaard, Jette B." docDate="2015" docId="2462E075FFA7A6666521FF77FA4615EE" docLanguage="en" docName="ActaProtozool.54.3.155-169.pdf" docOrigin="Acta Protozoologica 54 (3)" docSource="https://www.mendeley.com/catalogue/4f37d3b9-0ba9-3a93-9b4c-ca45f0e95209/" docStyle="DocumentStyle:64ABA4BEA387EE5C24A0DDEB32CC92E7.3:ActaProtozool.2014-.journal_article" docStyleId="64ABA4BEA387EE5C24A0DDEB32CC92E7" docStyleName="ActaProtozool.2014-.journal_article" docStyleVersion="3" docTitle="Porsildia acerviphora Thomsen & Østergaard, 2015, sp. nov." docType="treatment" docVersion="2" lastPageNumber="166" masterDocId="D85B980DFFACA66D655CFFA8FFE91774" masterDocTitle="Coccolithophorids in Polar Waters: Quaternariella and Porsildia gen. nov. Mercedesia gen. nov., Ericiolus," masterLastPageNumber="169" masterPageNumber="155" pageNumber="166" updateTime="1720040093326" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0">
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<mods:title id="5144238121ECF140C1924769DB172043">Coccolithophorids in Polar Waters: Quaternariella and Porsildia gen. nov. Mercedesia gen. nov., Ericiolus,</mods:title>
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<mods:namePart id="42D9685AB49BD7F03163C92CF4D1A7AB">Thomsen, Helge A.</mods:namePart>
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<mods:namePart id="FC3B40138A049B62BA9E04B5C4422ABD">Østergaard, Jette B.</mods:namePart>
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<mods:typeOfResource id="C2757F8AD05A1624AFF90ED7828F559F">text</mods:typeOfResource>
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<mods:title id="F5308678591CD391A149FB908D69BE64">Acta Protozoologica</mods:title>
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<mods:date id="386D2EE1BA466A36CFE05FBD24FE21C3">2015</mods:date>
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<mods:url id="F19B2A657F7FD52F0D2D4010D75412C6">https://www.mendeley.com/catalogue/4f37d3b9-0ba9-3a93-9b4c-ca45f0e95209/</mods:url>
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<treatment id="2462E075FFA7A6666521FF77FA4615EE" LSID="urn:lsid:plazi:treatment:2462E075FFA7A6666521FF77FA4615EE" httpUri="http://treatment.plazi.org/id/2462E075FFA7A6666521FF77FA4615EE" lastPageNumber="166" pageId="11" pageNumber="166">
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<subSubSection id="E4D102E8FFA7A6666521FF77FDC6178C" box="[125,559,222,249]" pageId="11" pageNumber="166" type="nomenclature">
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<paragraph id="AC745163FFA7A6666521FF77FDC6178C" blockId="11.[125,559,222,249]" box="[125,559,222,249]" pageId="11" pageNumber="166">
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<emphasis id="9EBF8D71FFA7A6666521FF77FDC6178C" bold="true" box="[125,559,222,249]" pageId="11" pageNumber="166">
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<taxonomicName id="6BCB2AE0FFA7A6666521FF77FEC2178D" authorityName="Thomsen & Østergaard" authorityYear="2015" box="[125,299,222,249]" class="Magnoliopsida" family="Caryophyllaceae" genus="Porsildia" kingdom="Plantae" order="Caryophyllales" pageId="11" pageNumber="166" phylum="Tracheophyta" rank="species" species="acerviphora" status="sp. nov.">
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<emphasis id="9EBF8D71FFA7A6666521FF77FEC2178D" bold="true" box="[125,299,222,249]" italics="true" pageId="11" pageNumber="166">P. acerviphora</emphasis>
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</taxonomicName>
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<taxonomicNameLabel id="858C300AFFA7A666646EFF77FE66178D" box="[306,399,223,249]" pageId="11" pageNumber="166" rank="species">sp. nov.</taxonomicNameLabel>
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(
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<figureCitation id="34F04DE6FFA7A66664C3FF76FDCE178C" box="[415,551,222,248]" captionStart-0="Figs 36–39" captionStart-1="Figs 40–41" captionStartId-0="12.[132,175,1661,1683]" captionStartId-1="13.[125,168,1002,1024]" captionTargetBox-0="[132,1457,223,1616]" captionTargetBox-1="[125,1463,223,962]" captionTargetId-0="figure-4@12.[132,1457,223,1617]" captionTargetId-1="figure-10@13.[125,1463,223,963]" captionTargetPageId-0="12" captionTargetPageId-1="13" captionText-0="Figs 36–39. Porsildia acerviphora. TEM whole mounts from Arctic Station, West Greenland, collected during 1990. 36 – cell with incomplete flagellation (only one flagellum visible); ten flagellar pole coccoliths with a central process; body coccoliths with an irregular rim formed by a mixture of differently shaped elements with squares (arrow) and pentagons (arrowhead); 37 – holotype; arrow points to a central appendage termination which is clearly divided into two elongate parallel elements; 38 – flagellar pole coccolith (detail from Fig. 36); 39 – high magnification of coccoliths (detail from Fig. 37); the central heap of elements as well as the irregular rim are evident; arrows point to square rim elements while toothed elements are denoted by arrowheads." captionText-1="Figs 40–41. Porsildia acerviphora. SEM whole mounts from Isfjorden, Svalbard, collected during august 2013. 40 – detail of anterior cell end showing flagellar pole coccoliths; notice the highly irregular rim on the coccolith that is laterally profiled; 41 – body coccoliths showing solid rims as well as heaps of elements covering the central parts of the coccolith central area; an arrow points to a particularly enlarged rim element." figureDoi-0="http://doi.org/10.5281/zenodo.12638220" figureDoi-1="http://doi.org/10.5281/zenodo.12638222" httpUri-0="https://zenodo.org/record/12638220/files/figure.png" httpUri-1="https://zenodo.org/record/12638222/files/figure.png" pageId="11" pageNumber="166">Figs 36–41</figureCitation>
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)
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</emphasis>
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</paragraph>
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</subSubSection>
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<subSubSection id="E4D102E8FFA7A66665FFFEB9FA4615EE" pageId="11" pageNumber="166" type="diagnosis">
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<paragraph id="AC745163FFA7A66665FFFEB9FEBD15F2" blockId="11.[125,771,273,853]" pageId="11" pageNumber="166">Diagnosis: With all characteristics of the genus. Up to 10 circumflagellar pole coccoliths. The central process measures 1.7–1.9 µm in length and 0.2–0.3 µm in width. The length of the distal twin pair of elongate elements is 0.5–0.7 µm. Body coccoliths oval (1.0–1.2 × 0.6–0.7 µm) with an irregular outline and a central heap of calcified elements. The rim has an irregular up- per margin and it is asymmetrical; one end bears a distinctly larger, widening and pointed, element of variable shape. The height of the rim is variable within the range 0.2–0.4 µm.</paragraph>
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<paragraph id="AC745163FFA7A66665FFFD26FF561464" blockId="11.[125,771,273,853]" pageId="11" pageNumber="166">
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<materialsCitation id="1CA35B3EFFA7A66665FFFD26FF561464" collectingDate="1990-09-01" country="Greenland" county="West" location="Arctic Station" municipality="Disko Bay" pageId="11" pageNumber="166" specimenCount="1" typeStatus="holotype">
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<typeStatus id="7370EFC1FFA7A66665FFFD26FEFC15DC" box="[163,277,654,680]" pageId="11" pageNumber="166" type="holotype">Holotype</typeStatus>
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:
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<figureCitation id="34F04DE6FFA7A666647DFD26FE4015DC" box="[289,425,654,680]" captionStart="Figs 36–39" captionStartId="12.[132,175,1661,1683]" captionTargetBox="[132,1457,223,1616]" captionTargetId="figure-4@12.[132,1457,223,1617]" captionTargetPageId="12" captionText="Figs 36–39. Porsildia acerviphora. TEM whole mounts from Arctic Station, West Greenland, collected during 1990. 36 – cell with incomplete flagellation (only one flagellum visible); ten flagellar pole coccoliths with a central process; body coccoliths with an irregular rim formed by a mixture of differently shaped elements with squares (arrow) and pentagons (arrowhead); 37 – holotype; arrow points to a central appendage termination which is clearly divided into two elongate parallel elements; 38 – flagellar pole coccolith (detail from Fig. 36); 39 – high magnification of coccoliths (detail from Fig. 37); the central heap of elements as well as the irregular rim are evident; arrows point to square rim elements while toothed elements are denoted by arrowheads." figureDoi="http://doi.org/10.5281/zenodo.12638220" httpUri="https://zenodo.org/record/12638220/files/figure.png" pageId="11" pageNumber="166">Figs 37, 39</figureCitation>
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(same cell) from
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<location id="A91407B8FFA7A66667DDFD26FF4715BF" LSID="urn:lsid:plazi:treatment:2462E075FFA7A6666521FF77FA4615EE:A91407B8FFA7A66667DDFD26FF4715BF" country="Greenland" county="West" municipality="Disko Bay" name="Arctic Station" pageId="11" pageNumber="166">Arctic Station</location>
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,
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<collectingMunicipality id="4C10CB19FFA7A66665E4FD19FEDC15BF" box="[184,309,689,715]" pageId="11" pageNumber="166">Disko Bay</collectingMunicipality>
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,
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<collectingCounty id="451529EFFFA7A666641CFD19FE9315BF" box="[320,378,689,715]" pageId="11" pageNumber="166">West</collectingCounty>
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<collectingCountry id="D4DC11F3FFA7A66664DCFD19FE1415BF" box="[384,509,689,715]" name="Greenland" pageId="11" pageNumber="166">Greenland</collectingCountry>
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, occurring in a sample from 50 metres depth (34 PSU, 2°C) processed
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<date id="D87577A3FFA7A66667E4FD7CFF521464" pageId="11" pageNumber="166" value="1990-09-01">
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<collectingDate id="C8318E4BFFA7A66667E4FD7CFF521464" pageId="11" pageNumber="166" value="1990-09-01">1 Sep. 1990</collectingDate>
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</date>
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.
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</materialsCitation>
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</paragraph>
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<paragraph id="AC745163FFA7A66665FFFCB1FF0F1421" blockId="11.[125,771,273,853]" pageId="11" pageNumber="166">Etymology: from ‘acervus’ (L) pile and ‘phora’ (Gr.) carrying.</paragraph>
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<paragraph id="AC745163FFA7A66665FFFC29FB651668" blockId="11.[125,771,897,1582]" lastBlockId="11.[809,1455,223,666]" pageId="11" pageNumber="166">
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<materialsCitation id="1CA35B3EFFA7A66665FFFC29FB611668" collectingDate="2012-06" collectingDateMax="2013-08" collectingDateMin="2012-06" collectorName="M. Heldal & Adventsfjord & Isfjord" country="Greenland" county="Univ. of Bergen" location="The" municipality="West" pageId="11" pageNumber="166" specimenCount="2">
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<location id="A91407B8FFA7A66665FFFC29FF3814EF" LSID="urn:lsid:plazi:treatment:2462E075FFA7A6666521FF77FA4615EE:A91407B8FFA7A66665FFFC29FF3814EF" box="[163,209,897,923]" country="Greenland" county="Univ. of Bergen" municipality="West" name="The" pageId="11" pageNumber="166">The</location>
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material from
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<collectingMunicipality id="4C10CB19FFA7A66664C3FC29FE3014EF" box="[415,473,897,923]" pageId="11" pageNumber="166">West</collectingMunicipality>
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<collectingCountry id="D4DC11F3FFA7A66664B7FC29FD8114EF" box="[491,616,897,923]" name="Greenland" pageId="11" pageNumber="166">Greenland</collectingCountry>
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, comprising only
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<specimenCount id="BACD9AEAFFA7A666659CFC0CFE9114C9" box="[192,376,931,958]" count="2" pageId="11" pageNumber="166" type="generic">two specimens</specimenCount>
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, is supplemented with material from Svalbard (courtesy of
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<collectorName id="013E34B5FFA7A666648EFC6FFDB91494" box="[466,592,966,993]" pageId="11" pageNumber="166">M. Heldal</collectorName>
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,
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<collectingCounty id="451529EFFFA7A666673CFC6EFF401377" pageId="11" pageNumber="166">Univ. of Bergen</collectingCounty>
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) collected from the
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<collectorName id="013E34B5FFA7A66664C1FC41FDD11377" box="[413,568,1001,1027]" pageId="11" pageNumber="166">Adventsfjord</collectorName>
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(
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<date id="D87577A3FFA7A6666715FC41FD2E1377" box="[585,711,1001,1027]" pageId="11" pageNumber="166" value="2012-06">
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<collectingDate id="C8318E4BFFA7A6666715FC41FD2E1377" box="[585,711,1001,1027]" pageId="11" pageNumber="166" value="2012-06">June 2012</collectingDate>
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</date>
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) and the
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<collectorName id="013E34B5FFA7A66665F4FBA3FF1F1351" box="[168,246,1035,1061]" pageId="11" pageNumber="166">Isfjord</collectorName>
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(
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<date id="D87577A3FFA7A666645AFBA4FE611352" box="[262,392,1036,1062]" pageId="11" pageNumber="166" value="2013-08">
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<collectingDate id="C8318E4BFFA7A666645AFBA4FE611352" box="[262,392,1036,1062]" pageId="11" pageNumber="166" value="2013-08">Aug. 2013</collectingDate>
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</date>
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). The SEM images (
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<figureCitation id="34F04DE6FFA7A6666729FBA3FD121352" box="[629,763,1035,1062]" captionStart="Figs 40–41" captionStartId="13.[125,168,1002,1024]" captionTargetBox="[125,1463,223,962]" captionTargetId="figure-10@13.[125,1463,223,963]" captionTargetPageId="13" captionText="Figs 40–41. Porsildia acerviphora. SEM whole mounts from Isfjorden, Svalbard, collected during august 2013. 40 – detail of anterior cell end showing flagellar pole coccoliths; notice the highly irregular rim on the coccolith that is laterally profiled; 41 – body coccoliths showing solid rims as well as heaps of elements covering the central parts of the coccolith central area; an arrow points to a particularly enlarged rim element." figureDoi="http://doi.org/10.5281/zenodo.12638222" httpUri="https://zenodo.org/record/12638222/files/figure.png" pageId="11" pageNumber="166">Figs 40–41</figureCitation>
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) document the general appearance of the robust central process. The solid and somewhat irregular rim is also evident from both micrographs, as is also the pile of rectangular elements found in the central area of a body coccolith. Numerical data comparing material from West
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<collectingCountry id="D4DC11F3FFA7A666659DFB73FE0D1381" box="[193,484,1243,1269]" isEnumeration="true" pageId="11" pageNumber="166">Greenland and Svalbard</collectingCountry>
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is provided in
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<tableCitation id="E14964D8FFA7A66667FDFB73FD161382" box="[673,767,1243,1270]" captionStart="Table 4" captionStartId="11.[125,181,1707,1728]" captionText="Table 4. Coccolith dimensions (µm) of Porsildia acerviphora." pageId="11" pageNumber="166">Table 4</tableCitation>
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. It is evident that the cells examined, irrespective of geographical origin or times of collection, are basically identical. It is evident from
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<figureCitation id="34F04DE6FFA7A666649EFAEBFDFC122A" box="[450,533,1347,1374]" captionStart="Figs 40–41" captionStartId="13.[125,168,1002,1024]" captionTargetBox="[125,1463,223,962]" captionTargetId="figure-10@13.[125,1463,223,963]" captionTargetPageId="13" captionText="Figs 40–41. Porsildia acerviphora. SEM whole mounts from Isfjorden, Svalbard, collected during august 2013. 40 – detail of anterior cell end showing flagellar pole coccoliths; notice the highly irregular rim on the coccolith that is laterally profiled; 41 – body coccoliths showing solid rims as well as heaps of elements covering the central parts of the coccolith central area; an arrow points to a particularly enlarged rim element." figureDoi="http://doi.org/10.5281/zenodo.12638222" httpUri="https://zenodo.org/record/12638222/files/figure.png" pageId="11" pageNumber="166">Fig. 41</figureCitation>
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that the central area heap of calcified elements in body coccoliths shows much diversity with regard to shape and dimensions of the individual elements. Some are square while others are rectangular. Typical dimensions are within the range 0.12–0.23 µm and the thickness of a plate ca. 0.05 µm. The material examined so far does not allow for conclusions with regard to the structure of the central area in the circumflagellar coccoliths
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</materialsCitation>
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.
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</paragraph>
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<paragraph id="AC745163FFA7A6666613FE8DFA4615EE" blockId="11.[809,1455,223,666]" pageId="11" pageNumber="166">
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<taxonomicName id="6BCB2AE0FFA7A6666613FE8DFBBD164B" authorityName="Thomsen & Østergaard" authorityYear="2015" box="[847,1108,293,319]" class="Magnoliopsida" family="Caryophyllaceae" genus="Porsildia" kingdom="Plantae" order="Caryophyllales" pageId="11" pageNumber="166" phylum="Tracheophyta" rank="species" species="acerviphora">
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<emphasis id="9EBF8D71FFA7A6666613FE8DFBBD164B" box="[847,1108,293,319]" italics="true" pageId="11" pageNumber="166">Porsildia acerviphora</emphasis>
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</taxonomicName>
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is included in this paper because of its Arctic origin and also because its body coccoliths have a structure similar to those found on the heterococcolithophorid species that forms part of the
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<taxonomicName id="6BCB2AE0FFA7A6666675FE18FBD616BE" box="[809,1087,432,458]" class="Coccolithophyceae" family="Calyptrosphaeraceae" genus="Quaternariella" kingdom="Chromista" order="Coccosphaerales" pageId="11" pageNumber="166" phylum="Haptophyta" rank="species" species="obscura">
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<emphasis id="9EBF8D71FFA7A6666675FE18FBD616BE" box="[809,1087,432,458]" italics="true" pageId="11" pageNumber="166">Quaternariella obscura</emphasis>
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</taxonomicName>
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life cycle (
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<figureCitation id="34F04DE6FFA7A666619DFE18FAA316BE" box="[1217,1354,431,458]" captionStart="Figs 28–35" captionStartId="10.[132,175,1725,1747]" captionTargetBox="[170,1417,223,1681]" captionTargetId="figure-5@10.[170,1417,223,1684]" captionTargetPageId="10" captionText="Figs 28–35. Quaternariella obscura. TEM whole mounts from Antarctica (EPOS) (Figs 28–29) and (Figs 30–35) West Greenland (Arctic Station). 28 – complete cell from the southern hemisphere; 29 – detail of the periplast from Fig. 28; 30 – Q. obscura combination cell (Arctic Station 1990) showing Papposphaera-like coccoliths along one side of the cell; arrows point to square rim elements and arrowheads to pentagonal elements; 31– a second combination cell (Arctic Station 1990) where heterococcoliths are visible as dark, oval structures; 32 – combination cell collected near Arctic Station during 1988; arrow points to square rim elements and arrowhead to pentagonal elements; 33 – Detail from Fig. 32; 34 – complete coccosphere with heterococcoliths that are similar to those shown in Figs 30, 32; 35 – detail from Fig. 34. Arrows point to square rim elements and arrowheads to pentagonal elements; notice also the irregular elements in the central area of the coccolith." figureDoi="http://doi.org/10.5281/zenodo.12638218" httpUri="https://zenodo.org/record/12638218/files/figure.png" pageId="11" pageNumber="166">Figs 30–35</figureCitation>
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). Shared characteristics are 1) the coccolith wall formed by an irregular mix of square (
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<figureCitation id="34F04DE6FFA7A666610EFE5DFAE61564" box="[1106,1295,501,528]" captionStart="Figs 28–35" captionStartId="10.[132,175,1725,1747]" captionTargetBox="[170,1417,223,1681]" captionTargetId="figure-5@10.[170,1417,223,1684]" captionTargetPageId="10" captionText="Figs 28–35. Quaternariella obscura. TEM whole mounts from Antarctica (EPOS) (Figs 28–29) and (Figs 30–35) West Greenland (Arctic Station). 28 – complete cell from the southern hemisphere; 29 – detail of the periplast from Fig. 28; 30 – Q. obscura combination cell (Arctic Station 1990) showing Papposphaera-like coccoliths along one side of the cell; arrows point to square rim elements and arrowheads to pentagonal elements; 31– a second combination cell (Arctic Station 1990) where heterococcoliths are visible as dark, oval structures; 32 – combination cell collected near Arctic Station during 1988; arrow points to square rim elements and arrowhead to pentagonal elements; 33 – Detail from Fig. 32; 34 – complete coccosphere with heterococcoliths that are similar to those shown in Figs 30, 32; 35 – detail from Fig. 34. Arrows point to square rim elements and arrowheads to pentagonal elements; notice also the irregular elements in the central area of the coccolith." figureDoi="http://doi.org/10.5281/zenodo.12638218" httpUri="https://zenodo.org/record/12638218/files/figure.png" pageId="11" pageNumber="166">Figs 30, 32, 35</figureCitation>
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,
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<figureCitation id="34F04DE6FFA7A6666042FE5DFAD6157B" box="[1310,1343,501,527]" captionStart="Figs 36–39" captionStartId="12.[132,175,1661,1683]" captionTargetBox="[132,1457,223,1616]" captionTargetId="figure-4@12.[132,1457,223,1617]" captionTargetPageId="12" captionText="Figs 36–39. Porsildia acerviphora. TEM whole mounts from Arctic Station, West Greenland, collected during 1990. 36 – cell with incomplete flagellation (only one flagellum visible); ten flagellar pole coccoliths with a central process; body coccoliths with an irregular rim formed by a mixture of differently shaped elements with squares (arrow) and pentagons (arrowhead); 37 – holotype; arrow points to a central appendage termination which is clearly divided into two elongate parallel elements; 38 – flagellar pole coccolith (detail from Fig. 36); 39 – high magnification of coccoliths (detail from Fig. 37); the central heap of elements as well as the irregular rim are evident; arrows point to square rim elements while toothed elements are denoted by arrowheads." figureDoi="http://doi.org/10.5281/zenodo.12638220" httpUri="https://zenodo.org/record/12638220/files/figure.png" pageId="11" pageNumber="166">39</figureCitation>
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; arrows), rectangular and pentagonal (
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<figureCitation id="34F04DE6FFA7A66661DBFDB0FAA21546" box="[1159,1355,535,562]" captionStart="Figs 28–35" captionStartId="10.[132,175,1725,1747]" captionTargetBox="[170,1417,223,1681]" captionTargetId="figure-5@10.[170,1417,223,1684]" captionTargetPageId="10" captionText="Figs 28–35. Quaternariella obscura. TEM whole mounts from Antarctica (EPOS) (Figs 28–29) and (Figs 30–35) West Greenland (Arctic Station). 28 – complete cell from the southern hemisphere; 29 – detail of the periplast from Fig. 28; 30 – Q. obscura combination cell (Arctic Station 1990) showing Papposphaera-like coccoliths along one side of the cell; arrows point to square rim elements and arrowheads to pentagonal elements; 31– a second combination cell (Arctic Station 1990) where heterococcoliths are visible as dark, oval structures; 32 – combination cell collected near Arctic Station during 1988; arrow points to square rim elements and arrowhead to pentagonal elements; 33 – Detail from Fig. 32; 34 – complete coccosphere with heterococcoliths that are similar to those shown in Figs 30, 32; 35 – detail from Fig. 34. Arrows point to square rim elements and arrowheads to pentagonal elements; notice also the irregular elements in the central area of the coccolith." figureDoi="http://doi.org/10.5281/zenodo.12638218" httpUri="https://zenodo.org/record/12638218/files/figure.png" pageId="11" pageNumber="166">Figs 30, 32, 35</figureCitation>
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,
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<figureCitation id="34F04DE6FFA7A6666001FDB0FA971546" box="[1373,1406,536,562]" captionStart="Figs 36–39" captionStartId="12.[132,175,1661,1683]" captionTargetBox="[132,1457,223,1616]" captionTargetId="figure-4@12.[132,1457,223,1617]" captionTargetPageId="12" captionText="Figs 36–39. Porsildia acerviphora. TEM whole mounts from Arctic Station, West Greenland, collected during 1990. 36 – cell with incomplete flagellation (only one flagellum visible); ten flagellar pole coccoliths with a central process; body coccoliths with an irregular rim formed by a mixture of differently shaped elements with squares (arrow) and pentagons (arrowhead); 37 – holotype; arrow points to a central appendage termination which is clearly divided into two elongate parallel elements; 38 – flagellar pole coccolith (detail from Fig. 36); 39 – high magnification of coccoliths (detail from Fig. 37); the central heap of elements as well as the irregular rim are evident; arrows point to square rim elements while toothed elements are denoted by arrowheads." figureDoi="http://doi.org/10.5281/zenodo.12638220" httpUri="https://zenodo.org/record/12638220/files/figure.png" pageId="11" pageNumber="166">39</figureCitation>
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; arrowheads) elements, and 2) the occurrence of a central structure of differently sized and shaped elements in the central area of the body coccoliths (
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<figureCitation id="34F04DE6FFA7A6666199FD28FAA215EE" box="[1221,1355,639,666]" captionStart="Figs 28–35" captionStartId="10.[132,175,1725,1747]" captionTargetBox="[170,1417,223,1681]" captionTargetId="figure-5@10.[170,1417,223,1684]" captionTargetPageId="10" captionText="Figs 28–35. Quaternariella obscura. TEM whole mounts from Antarctica (EPOS) (Figs 28–29) and (Figs 30–35) West Greenland (Arctic Station). 28 – complete cell from the southern hemisphere; 29 – detail of the periplast from Fig. 28; 30 – Q. obscura combination cell (Arctic Station 1990) showing Papposphaera-like coccoliths along one side of the cell; arrows point to square rim elements and arrowheads to pentagonal elements; 31– a second combination cell (Arctic Station 1990) where heterococcoliths are visible as dark, oval structures; 32 – combination cell collected near Arctic Station during 1988; arrow points to square rim elements and arrowhead to pentagonal elements; 33 – Detail from Fig. 32; 34 – complete coccosphere with heterococcoliths that are similar to those shown in Figs 30, 32; 35 – detail from Fig. 34. Arrows point to square rim elements and arrowheads to pentagonal elements; notice also the irregular elements in the central area of the coccolith." figureDoi="http://doi.org/10.5281/zenodo.12638218" httpUri="https://zenodo.org/record/12638218/files/figure.png" pageId="11" pageNumber="166">Figs 33, 35</figureCitation>
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,
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<figureCitation id="34F04DE6FFA7A666600AFD28FA9F15EE" box="[1366,1398,640,666]" captionStart="Figs 36–39" captionStartId="12.[132,175,1661,1683]" captionTargetBox="[132,1457,223,1616]" captionTargetId="figure-4@12.[132,1457,223,1617]" captionTargetPageId="12" captionText="Figs 36–39. Porsildia acerviphora. TEM whole mounts from Arctic Station, West Greenland, collected during 1990. 36 – cell with incomplete flagellation (only one flagellum visible); ten flagellar pole coccoliths with a central process; body coccoliths with an irregular rim formed by a mixture of differently shaped elements with squares (arrow) and pentagons (arrowhead); 37 – holotype; arrow points to a central appendage termination which is clearly divided into two elongate parallel elements; 38 – flagellar pole coccolith (detail from Fig. 36); 39 – high magnification of coccoliths (detail from Fig. 37); the central heap of elements as well as the irregular rim are evident; arrows point to square rim elements while toothed elements are denoted by arrowheads." figureDoi="http://doi.org/10.5281/zenodo.12638220" httpUri="https://zenodo.org/record/12638220/files/figure.png" pageId="11" pageNumber="166">39</figureCitation>
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<figureCitation id="34F04DE6FFA7A66660DDFD28FA4B15EE" box="[1409,1442,640,666]" captionStart="Figs 40–41" captionStartId="13.[125,168,1002,1024]" captionTargetBox="[125,1463,223,962]" captionTargetId="figure-10@13.[125,1463,223,963]" captionTargetPageId="13" captionText="Figs 40–41. Porsildia acerviphora. SEM whole mounts from Isfjorden, Svalbard, collected during august 2013. 40 – detail of anterior cell end showing flagellar pole coccoliths; notice the highly irregular rim on the coccolith that is laterally profiled; 41 – body coccoliths showing solid rims as well as heaps of elements covering the central parts of the coccolith central area; an arrow points to a particularly enlarged rim element." figureDoi="http://doi.org/10.5281/zenodo.12638222" httpUri="https://zenodo.org/record/12638222/files/figure.png" pageId="11" pageNumber="166">41</figureCitation>
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).
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</paragraph>
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</subSubSection>
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</treatment>
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</document> |